What are the cheapest airlines to fly from Idaho to London one-way?

The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as £344. However, be on the lookout for offers from SWISS and KLM, as they are both options that can get you from Idaho to London for a low price.

What are the most popular routes from Idaho to London?

While some choose either Spokane - London Heathrow or Boise Air Term. Gowen Fld - London Gatwick, Boise Air Term. Gowen Fld - London Heathrow is the most popular route from Idaho to London.

How far in advance should I book a flight from Idaho to London?

To save up to 27% on this flight, we recommend booking at least 36 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Idaho to London from £534 1-2 weeks out and tickets from £639 for flights departing within the next 72 hours.

What is the cheapest month to fly from Idaho to London?

Flights from Idaho to London lean towards being more expensive in June. Prices are generally better when you fly from Idaho to London in October, with the cheapest ticket starting at £444.

Can I find deals for flights from Idaho to London that include hotel bookings?

Yes. In addition to deals on Idaho to London flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Idaho to London?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho to London.

Can I find deals for business class flights from Idaho to London?

Yes. Cheapflights offers flight deals from Idaho to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£205+ Flights from Idaho to London

Cheap flight deals from Idaho to London

Round-trip from	£445
One-way from	£205
Popular in	June
Cheapest in	October
Average price	£1,043

29/9-8/10
2 total stops
38h 37m total
Idaho to London

Search Deals

14/7
1 total stop
20h 50m total
Idaho to London

Search Deals

Highest demand for flights based on searches. 22% potential increase in price (£148 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease (£25 potential savings vs. average return price).

Search Deals

Average for round-trip flights in June 2025

Search Deals

Find flight deals from Idaho to London

Cheapest flights from Idaho to London
Explore the most affordable flight options available from Idaho to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 June 2025.

Mon 29/906:25GEG - LGW

1 stop19h 05mMultiple Airlines

Wed 8/1010:55LGW - GEG

1 stop19h 32mMultiple Airlines

Deal found 11/6£445

Fri 15/808:18BOI - LGW

1 stop19h 37mMultiple Airlines

Mon 25/814:00LGW - BOI

2 stops40h 59mMultiple Airlines

Deal found 11/6£452

Wed 8/1015:05BOI - LHR

2 stops20h 25mScandinavian Airlines

Fri 17/1010:20LHR - BOI

2 stops19h 44mScandinavian Airlines

Deal found 10/6£517

Fri 12/913:00GEG - LHR

2 stops36h 20mScandinavian Airlines

Fri 26/906:40LHR - GEG

2 stops18h 17mScandinavian Airlines

Deal found 12/6£529

Sun 9/1106:20BOI - LHR

2 stops22h 30mAir Canada

Fri 21/1114:30LHR - BOI

2 stops30h 14mAir Canada

Deal found 11/6£536

Tue 19/805:15GEG - LHR

1 stop23h 05mUnited Airlines

Fri 29/809:30LHR - GEG

2 stops33h 57mUnited Airlines

Deal found 11/6£536

Sun 9/1107:21BOI - LHR

1 stop21h 19mIberia

Fri 21/1106:25LHR - BOI

2 stops21h 53mIberia

Deal found 11/6£539

Fri 7/1111:25GEG - LHR

2 stops59h 05mMultiple Airlines

Tue 18/1107:40LHR - GEG

2 stops21h 05mMultiple Airlines

Deal found 11/6£539

Sun 26/1010:45JAC - LHR

1 stop16h 55mUnited Airlines

Thu 6/1118:00LHR - JAC

2 stops33h 37mUnited Airlines

Deal found 11/6£541

Wed 3/910:40BOI - LHR

1 stop16h 00mUnited Airlines

Tue 16/907:25LHR - BOI

2 stops19h 08mUnited Airlines

Deal found 12/6£541

Wed 12/1111:30JAC - LHR

1 stop15h 30mAir France

Thu 20/1106:20LHR - JAC

2 stops17h 02mAir France

Deal found 12/6£546

Tue 11/1107:21BOI - LGW

2 stops19h 54mIberia

Wed 19/1119:35LGW - BOI

2 stops23h 58mIberia

Deal found 11/6£548

Best flights from Idaho to London
Discover carefully curated flight deals from Idaho to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 13 June 2025.

Mon 29/906:25GEG - LGW

1 stop19h 05mMultiple Airlines

Wed 8/1010:55LGW - GEG

1 stop19h 32mMultiple Airlines

Deal found 11/6£445

Wed 8/1015:05BOI - LHR

2 stops20h 25mScandinavian Airlines

Fri 17/1010:20LHR - BOI

2 stops19h 44mScandinavian Airlines

Deal found 10/6£517

Sun 9/1106:20BOI - LHR

2 stops22h 30mAir Canada

Fri 21/1114:30LHR - BOI

2 stops30h 14mAir Canada

Deal found 11/6£536

Tue 19/805:15GEG - LHR

1 stop23h 05mUnited Airlines

Fri 29/809:30LHR - GEG

2 stops33h 57mUnited Airlines

Deal found 11/6£536

Sun 9/1107:21BOI - LHR

1 stop21h 19mIberia

Fri 21/1106:25LHR - BOI

2 stops21h 53mIberia

Deal found 11/6£539

Wed 12/1111:30JAC - LHR

1 stop15h 30mAir France

Thu 20/1106:20LHR - JAC

2 stops17h 02mAir France

Deal found 12/6£546

Wed 12/1111:30JAC - LHR

1 stop15h 30mKLM

Thu 20/1110:45LHR - JAC

1 stop17h 18mKLM

Deal found 12/6£552

Sun 23/1114:31BOI - LHR

2 stops24h 49mLufthansa

Tue 2/1220:15LHR - BOI

2 stops32h 01mLufthansa

Deal found 11/6£567

Sun 3/815:43BOI - LHR

1 stop18h 32mDelta

Tue 19/811:30LHR - BOI

2 stops18h 27mDelta

Deal found 11/6£583

Fri 1/815:35BOI - LHR

1 stop14h 10mFinnair

Tue 19/810:30LHR - BOI

1 stop18h 13mFinnair

Deal found 12/6£589

Mon 4/813:39GEG - LHR

1 stop12h 41mAmerican Airlines

Thu 14/812:00LHR - GEG

1 stop18h 36mAmerican Airlines

Deal found 12/6£602

Mon 8/914:42BOI - LCY

2 stops35h 08mSWISS

Mon 22/908:10LCY - BOI

2 stops20h 04mSWISS

Deal found 11/6£609

Last-minute flights from Idaho to London
Discover last-minute flight deals from Idaho to London. Data last updated 13 June 2025 and is based on user searches.

Wed 18/616:50BOI - LGW

2 stops14h 50mIcelandair

Wed 25/615:35LGW - BOI

2 stops38h 11mIcelandair

Deal found 11/6£939

Wed 18/616:50BOI - LHR

2 stops20h 30mIcelandair

Wed 25/621:25LHR - BOI

2 stops32h 21mIcelandair

Deal found 11/6£942

Wed 18/617:46BOI - LGW

2 stops31h 09mMultiple Airlines

Wed 25/610:55LGW - BOI

1 stop18h 59mMultiple Airlines

Deal found 11/6£1,072

Wed 18/605:10BOI - LHR

1 stop21h 30mUnited Airlines

Wed 25/614:05LHR - BOI

2 stops35h 02mUnited Airlines

Deal found 11/6£1,264

Wed 18/615:00BOI - LHR

1 stop15h 10mKLM

Wed 25/613:05LHR - BOI

1 stop16h 24mKLM

Deal found 11/6£1,281

Sat 21/617:55IDA - LHR

2 stops31h 40mUnited Airlines

Wed 9/714:05LHR - IDA

2 stops32h 24mUnited Airlines

Deal found 11/6£1,275

Sun 22/606:05GEG - LGW

1 stop20h 50mMultiple Airlines

Fri 4/710:55LGW - GEG

2 stops30h 36mMultiple Airlines

Deal found 11/6£1,130

Sun 22/620:48GEG - LHR

2 stops15h 32mIcelandair

Fri 4/721:25LHR - GEG

2 stops25h 15mIcelandair

Deal found 11/6£1,150

Sun 22/607:00GEG - LHR

1 stop15h 20mUnited Airlines

Fri 4/714:05LHR - GEG

2 stops38h 58mUnited Airlines

Deal found 11/6£1,264

Sun 22/612:29GEG - LHR

1 stop17h 01mKLM

Fri 4/712:25LHR - GEG

1 stop15h 07mKLM

Deal found 11/6£1,281

Mon 23/611:20IDA - LHR

1 stop15h 30mDelta

Wed 2/711:00LHR - IDA

1 stop14h 12mDelta

Deal found 13/6£1,281

Mon 23/615:04IDA - LHR

1 stop11h 46mKLM

Wed 2/711:00LHR - IDA

1 stop18h 55mKLM

Deal found 11/6£1,281

One-way flights from Idaho to London
Search for one-way flight options from Idaho to London. Find affordable one-way fares based on user searches. Data last updated 13 June 2025.

Mon 14/706:05GEG - LGW

1 stop20h 50mMultiple Airlines

Deal found 11/6£205

Fri 3/1006:35BOI - LHR

2 stops22h 20mMultiple Airlines

Deal found 10/6£246

Wed 23/707:16BOI - LHR

1 stop16h 09mAmerican Airlines

Deal found 11/6£344

Wed 23/714:32BOI - LGW

2 stops20h 23mSWISS

Deal found 11/6£358

Wed 23/714:32BOI - LCY

2 stops35h 18mSWISS

Deal found 11/6£371

Fri 3/1013:43BOI - LHR

1 stop14h 27mKLM

Deal found 10/6£378

Fri 12/906:30GEG - LHR

2 stops15h 55mDelta

Deal found 11/6£378

Mon 14/717:52GEG - LHR

2 stops32h 08mMultiple Airlines

Deal found 11/6£397

Mon 30/613:00JAC - LHR

2 stops17h 10mVirgin Atlantic

Deal found 11/6£422

Mon 14/709:05GEG - LGW

2 stops16h 55mDelta

Deal found 11/6£428

Mon 14/714:22GEG - LHR

1 stop14h 48mKLM

Deal found 11/6£428

Sun 13/718:53JAC - LHR

2 stops18h 07mDelta

Deal found 11/6£429

Cheapflights Fare Finder

Use the filters below to find and compare flights from Idaho to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SpokaneLondon

GEG - LGW

GEGLGW

Spokane

Mon 29/9

06:25-09:30

1 stop19h 05m

London Gatwick

Wed 8/10

10:55-22:27

1 stop19h 32m

£445

BoiseLondon

BOI - LGW

BOILGW

Boise Air Term. Gowen Fld

Fri 15/8

08:18-10:55

1 stop19h 37m

London Gatwick

Mon 25/8

14:00-23:59

2 stops40h 59m

£452

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 8/10

15:05-18:30

2 stops20h 25m

London Heathrow

Fri 17/10

10:20-23:04

2 stops19h 44m

£517

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Fri 12/9

13:00-09:20

2 stops36h 20m

London Heathrow

Fri 26/9

06:40-16:57

2 stops18h 17m

£529

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sun 9/11

06:20-11:50

2 stops22h 30m

London Heathrow

Fri 21/11

14:30-13:44

2 stops30h 14m

£536

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 19/8

05:15-12:20

1 stop23h 05m

London Heathrow

Fri 29/8

09:30-11:27

2 stops33h 57m

£536

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sun 9/11

07:21-11:40

1 stop21h 19m

London Heathrow

Fri 21/11

06:25-21:18

2 stops21h 53m

£539

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Fri 7/11

11:25-06:30

2 stops59h 05m

London Heathrow

Tue 18/11

07:40-20:45

2 stops21h 05m

£539

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Sun 26/10

10:45-09:40

1 stop16h 55m

London Heathrow

Thu 6/11

18:00-20:37

2 stops33h 37m

£541

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 3/9

10:40-09:40

1 stop16h 00m

London Heathrow

Tue 16/9

07:25-19:33

2 stops19h 08m

£541

Flights are sorted by cheapest return flights first.

Deals found on 11/6

Showing 1-10 of 60 results

...

Best time to book a flight from Idaho to London

Have a flexible travel schedule? Discover the best time to fly to London from Idaho with our price prediction graph.

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Idaho to London

What is the cheapest month to book a flight from Idaho to London?

Currently, January is the cheapest month in which you can book a flight from Idaho to London (average of £112). Flying from Idaho to London in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ID to LON?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Idaho to London as you normally would.

Rainfall in London by month

In terms of precipitation, rainfall in London ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London when rainfall is around 40.0 mm.

Temperature in London by month

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

Reviews of airlines servicing London

Read through reviews of airlines operating flights from Idaho to London, such as Delta, KLM and Finnair. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

7,950 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very Good

7,950 reviews

Delta

8.0

Very Good

7,950 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

KLM

7.8

Good

1,358 reviews

Delta

8.0

Very Good

7,950 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Finnair

7.6

Good

1,290 reviews

Delta

8.0

Very Good

7,950 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Air France

7.5

Good

1,463 reviews

Delta

8.0

Very Good

7,950 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

SWISS

7.5

Good

1,624 reviews

Delta

8.0

Very Good

7,950 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

What are the cheapest airlines to fly from Idaho to London one-way?
The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as £344. However, be on the lookout for offers from SWISS and KLM, as they are both options that can get you from Idaho to London for a low price.
What are the most popular routes from Idaho to London?
While some choose either Spokane - London Heathrow or Boise Air Term. Gowen Fld - London Gatwick, Boise Air Term. Gowen Fld - London Heathrow is the most popular route from Idaho to London.
Can I find deals for flights from Idaho to London that include hotel bookings?
Yes. In addition to deals on Idaho to London flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Idaho to London?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho to London.
Can I find deals for business class flights from Idaho to London?
Yes. Cheapflights offers flight deals from Idaho to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Idaho to London?
Currently, January is the cheapest month in which you can book a flight from Idaho to London (average of £112). Flying from Idaho to London in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Deal

Hounslow

Croydon

Milton Keynes

Gatwick

Luton

Slough

Wembley

Crawley

Eastbourne

Ilford

Southend-on-Sea

Watford

Hayes

Ipswich

Winchester

Folkestone

Maidstone

Dartford

Guildford

Browse thousands of different options on Cheapflights for your next trip

Top airline flying from Idaho to London

Airline	Cheapest	Average	Flexibility	On-time
Virgin Atlantic	Cheapest£447	Average£883	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights

Fly with Cheapflights

How does Cheapflights help users find flights from Idaho to London?

When you search for this flight from Idaho to London, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Idaho to London?

Millions of users choose and trust Cheapflights to book the best flight deals from Idaho to London for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Idaho to London with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Idaho to London flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Idaho to London become cheaper?

Of course! You can now track prices for flights from Idaho to London and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from Idaho to London from £205

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 14/7. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Idaho to London

Keep the following information in mind while searching for Idaho to London flight deals. Data was last updated 13 June 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Idaho to London

Cheapest flights from Idaho to LondonExplore the most affordable flight options available from Idaho to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 June 2025.

Explore the most affordable flight options available from Idaho to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 June 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Idaho to London that are best for you.

Best time to book a flight from Idaho to London

Have a flexible travel schedule? Discover the best time to fly to London from Idaho with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Idaho to London

What is the cheapest month to book a flight from Idaho to London?

What is the cheapest time of day to fly from ID to LON?

Find hourly flight availability from Idaho to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 13 June 2025.

Rainfall in London by month

Plan your trip to London by taking into account the average rainfall totals by month.

Temperature in London by month

Plan your trip to London by taking into account the average temperature totals by month.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated 13 June 2025.

Read through reviews of airlines operating flights from Idaho to London, such as Delta, KLM and Finnair. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Idaho to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines to fly from Idaho to London one-way?

What are the most popular routes from Idaho to London?

Can I find deals for flights from Idaho to London that include hotel bookings?

How can I find direct flights from Idaho to London?

Can I find deals for business class flights from Idaho to London?

What is the cheapest month to book a flight from Idaho to London?

Travelling to a place near Idaho?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Idaho to London

See prices for flight routes from nearby airports that may be better suited for you.

Top airline flying from Idaho to London

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Idaho to London?

Why should you use Cheapflights to find cheap flight tickets from Idaho to London?

Can Cheapflights find flights from Idaho to London with no change fees?

Can Cheapflights notify me if prices for flights from Idaho to London become cheaper?

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Cheapest flights from Idaho to London
Explore the most affordable flight options available from Idaho to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 June 2025.